Contractible collar.



J. 1?. KEENAN. GONTRAGTIBLE COLLAR.

APPLICATION FILED JAN. 3, 1912.

Patented Feb. 25, 1913.

nvvmrok I ATTORNEY UNITED STATES PATENT OFFICE.

JOHN FRANCIS KEENAN, OF TAYLOR. WASHINGTON, ASSIGNOR TO DENNY-BENTON CLAY & COAL COMPANY, OF SEATTLE, WASHINGTON, A CORPORATIQN 0F WASH- INGTON.

To all whom it may concern."

Be it known that I, JOHN F. Keenan, a citizen of the United States, residing. at Taylor, in the county of King and State of W'ashington, have invented certainnew and useful Improvements .in Con t1'act1ble Collars, of which the following is a specifi"ation.

This invention relates to improvements in apparatus for..manipu1ating vitrified clay pipe in process of manufacture The object of the invention is the -prov1- sion 'of devices for contracting the ends of sewer pipe as the same stand upon the floor of the drying room. After molding the moist pipe is carried to the drying shed to partially dry before vitrification. The pipe shrinks considerably in drying and as the lower end adheres to the floor the extreme end cannot partake of the contractile movement of the pipe wall thereabove. If

unrelieved, said adhesion results in bellmo'uth distort-ion of the lower end and cracks and blemishes thereabout to removewhich adds largely 'to the expense of manufacture. The usual practice to overcome these causes of damage is to turn the pipe upside down at relatively frequent intervals to free the lower end from adhesion to the floor. In spite of these laborious means of prevention faults are found in the pipe ends that it is the further object of this invention to obviate.

With these objects in .view, the invention consists in the novel construction of a contractible collar for the .ends of unbaked sewer-pi e, with the combination and adaptation 0 parts, as will be hereinafte'r' de scribed in.the following specification, illustrated in the accompanying drawings, and finally set forth in the appended claims.

In the drawings, Figure 1 is a side elevation of an embodiment of my invention shown in operative engagement about a section of pipe. Fig. 2 is a perspective view of one of the collar elements. Fig. 3 is a fragmentary view similar to Fig. 1 with the parts in a different position. Fig. 4 is a perspective view of the operating bar, partly broken away. Fig. 5 is a fragmentary perspective view of a modification of the invention.

Referring to said drawings, the reference numerals 1, 1" respectively desi ate semicircular metal angle-plates whic with de- Specification of Letters Patent.

Application filed January 3, 1912.

ooNTaAoTIBtE COLLAR.

Patented Feb. 25. 1913.

Serial No. 669.190.

vices provided thereon, are counterparts of each other; the particular description of one therefore serving for both members. F ixedly secured to .the lower horizontal flange '2 at one end A" of 'each said plate is a pin 3 disposed approximately radial to the geometric axis of the plate. Said pin is supported somewhat above the said flange upon a rigidly secured brace l which may be bifurcated to afford an intermediate space 5.

In proximity of the opposite end B the plate is provided with an upstanding bracket 7 rigidly secured thereto extending above the upper edge of the vertical flange 6 and formed at its upper extremity with an outwardly protruding pintlc 7.

8 designates a stop curved to an arc corresponding to that of flange (3 and provided at one end with an elongated slot 9, through which protrudes a bolt 9 threaded at one end that is engaged in a threaded hole in said flange (i. 'lhrough said bolt the bar is secured in various positions relative to the extension of its forward end 10 beyond the extremity of the plate.

A pair of bars ll complete the structure of the embodiment shown and each comprises a handle 12 formed at its lower end with an elongated slot 13 whose major axis is in parallel with'the handle and an integral foot portion 14 formed at an angle to the handle and terminating in a downwardly directed hooked end 15.

The mode of operation of the invention may be described as follows: The pipe tion is repeated several times while the pipe is drying. Specifically describing this operation of the devices and referring especially to Figs. 1 and 3, it is to be noted that each sized diameter of pipe is provided with a correspondingly proportioned collar." A pair of similarly constructed semi-circular spective pintle 7 in slot 13 wherein it will be positioned in proximity of its upper end,

as shown in Fig. 3, and the hooked end 15' in the space 5 to engage the pin 3 of the opposite plate. The bars having been thus positioned, a workman at each side exerts pressure upon the bar-handles 12' inthe direction of the arrow in Fig. 1. The pin 3 and the pintle 7 are acted upon by leverage of the bar to draw the plates together in closer relation until the forward end 10 of the stop 8 contacts with the pin 3 of the opposing plate. Such relative movement causes said pintle to slide in closer relation to the bottom of the slot 13, as shown in Fig. 1. The plastic material of the pipe engaged by the vertical flange 6 is pressed inwardly to approximately the exterior form of. the drying material thereabove. The drying and shrinking continuing in the pipe the aforedescribed operations are repeated from time to time until the pipe is in condition to be burned in the kilns. At each succeeding application of the collar to the pipe, however, the stop 8 is retracted through means ofbolt 9 to reduce the intervening space between plates when the stopend 10 is in engagement with the pin 3, as described. As a large number of pipe of the same size and. condition are to be thus treated at about the same time and the successive like operations upon the pipe are similarly repeated upon all, the stop 8 need be changed infrequently as upon successive days or after an interval of one or more days, as the case may be.

The device is advantageous as it obviates entirely the necessity of turning the pipe and-reduces the cost of repairing the ends of the pipe very materially. The vertical flange 6 of each plate may be provided with corrugations or a roughened surface on its inner face toaiford a like surface upon the spigot end of the pipe see Fig. 5. In some classes of work where the joints between the several sect-ions of pipe are to be cemented, it is an advantage to have the adjacent. surfaces of the pipe roughened to which the cement will stick more firmly.

What I claim is 1. In a device, of the class described, the combination of a pair of flanged semi-circular plates, each provided at their opposite ends with a horizontally disposed pin, a lever-bar having means for detachable connection with said pins, and an adjustable stop provided at an end of said plates.

2. In a device of the class described, the combination with a pair of semi-circular plates adapted to be positioned in opposite spaced relation to form a collar, each said plate formed with a vertical and a horizontal flange, a fixedly supported pin on the opposite ends of each plate, an adjustable stop protruding beyond an end of each plate,

and a lever-bar adapted to be operatively ferent elevations on the opposite ends ofeach plate, an adjustable stop. protruding beyond an end of each plate, and a lever-bar adapted to be operativelv engagedwith a pin on each of said plates to draw the plates together.

4. In a device of the class described, the combination with a pair of semi-circular plates adapted to be positioned in opposite relation to fornr a collar, each said plate formed with a vertically arranged walland at its ends with engageable deviws, and an adjustable stop projecting beyond the end of each plate, of a pair of lever-barseach provided atone extremity with means for detachably engaging said devices. a

Signed at Seattle 'aslr, this 22nd day of December, 1911.

' JOHN FRANCIS KEENAN.

lVitnesses:

N. E. VAN WART, F. W. SHILLEsTAp.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. 0. 

